Court records made public Tuesday showed that FBI agents talked to the former neighborhood watch leader's neighbors about his racial attitudes. The agents also interviewed a former co-worker of Zimmerman, as well as a resident about the legacy of racism in the city of Sanford as part of their civil rights investigation into the fatal shooting of 17-year-old Trayvon Martin.

Zimmerman is charged with fatally shooting Martin last February during a confrontation at a gated community.